US1131249A - Retaining-ring for dynamo-electric machines. - Google Patents

Description

. BIB. KNIGHT.

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"WI llllllll UMTED STATES PATENT EARLE R. KNIGHT, 0F NORW'OOD, OHIO, ASS

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ALLIS- RETAINING-RING FOR DYNAMO-ELEGTRIC IZZACHINES.

Application filed May 1, 1909.

T aZZ whom it may concern e it known that I, Ennnn R. KNIGHT, a citizen of the United States, residing at Norwoot, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Retaining-Rings for Dynamo-Electric Machines, of which the following is a full, clear, and exact specification.

My invention relates to dynamo-electric machines, and particularly to means for securely holding in position the laminae of the cores of either the rotor or stator.

The object of my invention is to provide simple, inexpensive and effective means for retaining the laminae in position, and one that can be easily applied to the machine or removed when it is desired to remove the laminae.

In carrying out my invention, I provide a split retaining ring which is seated in a groove in a support such as a shaft, spider or frame.

More specifically considered my invention consists of a core of a dynamo-electric machine comprising laminae, the laminae being clamped on a support between plates, one of said plates being held in position by an abutment on said support and the other plate being held in position by a split ring partially seated in a groove in the support.

My invention further consists in certain novel details of construction and combination of elements described in the specification and set forth in the appended claims.

In the accompanying drawings Figure l is a sectional elevation of a rotor having the laminie mounted directly on a shaft and held in position by my improved retaining means; Fig. 2 is an enlarged sectional view of he retaining means shown in Fig. 1; Fig. 3 is a perspective view of one-half of one of the split retaining rings. Figs. 4: and 5 are sections showing modified forms of my invention.

A core 12, preferably laminated and inherently expansible is mounted directly on a shaft 10. The shaft is provided with an abutment 11 against which a plate 13 rests. The laminae of the core 12 are held between this plate 13 and another plate 1% by in split ring 15 which is partially seated in a circumferential groove in the shaft 10. One half of the preferred form of split retaining Specification of Letters Patent.

Patented Mar. 9, 1915. Serial in). 493,399.

ring is shown in perspective in ig. 8. it comprises two segmental duplicate interchangeable parts each part of which has two male portions 16 and two female portions 17. The male and female portions of one part of the split retaining rings are respectively complementary to the female and male portions of the other part. When the two parts having interlocking projections are placed in the groove 18 and locked together, they prevent an outward movement of the laminae and plates. Furthermore when this split retaining ring is set in the groove and the male portions of one part engage tie female portions of the other part it is impossible for the action'of centrifugal force to throw the ring out of the groove. The groove 18 in the shaft 10 is made considerably wider than the width of the ring. This is neces sary in order to insert the two parts of the split ring before the complementary elements are in contact and locked.

in two modifications of my invention illus trated in Figs. 4 and 5, I have shown the split rings having inclined faces 19 and :20 engaging grooves which are also provided with inclined faces. it is further evident that my invention may be applied to the stator as well as to the rotor.

It is evident that my invention is capable of having a great many modifications and I aim to cover all of the modifications which do not depart from the spirit and scope of the invention.

What I claim as new is 1. n combination with a support of approximately cylindrical cross-section and provided with an annular recess, an element mounted on said support, and a ring made up of segmental pieces disposed in said recess and bearing against a side thereof, said segmental pieces having interlocking projections and being held together by pressure on opposite sides of said ring, and said ring acting to prevent movement of said element axially of said support.

2. in combination with a support, an inherently eXpansible element mounted on said support, and a ring made up of segmental pieces having interlocking projections which extend parallel to the axis of the support, said segmental pieces being held in position with their interlocking projections in engagement by pressure on oppoplurality site sides of said ring, and said ring acting to prevent movement of said core axially of said support.

3. A device for holding laminations on a cylinder, comprising a ring composed of a plurality of similar, interchangeable, segmental members, each having male an emale portions, the male portions of each member extending parallel to the axis of the ring and in opposite directions.

L. In combination, a shaft, a body mounted thereon and comprising an inherently expansible part, a shoulder on said shaft, and means for holding said body against axial movement comprising a ring composed of a pluralit Y of similar sections and engaging said shoulder, each section of said ring being provided with interengaging portions to prevent radial displacement and being removable from said shaft by axial movement of one section toward said expansible part.

5. In combination, a shaft, a body mounted thereon and comprising an inherently expansible part, a shoulder on said shaft and means for holding said body against axial movement comprising a ring composed of a of similar,

interchangeable seesection provided with oppositelytions, each Copies of this; patent may beiobtained for five cents each,

disposed, axially-extending projections at its ends and engaging said shoulder, said ring being removable from said shaft by axial movement of one section toward said expansible part.

6. In a device for holding a body comprising an inherently expansible elementagainst movement on a support, a ring made up of segmental pieces having interlocking projections extending parallel to the axisof said support, said segmental pieces being adapted to be held in position with their interlocking projections in engagement by pressure on opposite sides of said ring.

7. A ring comprising a plurality of segmental members each having a plurality of male and female portions, each of said portions coacting with a complementary portion of another of said members, the male portions of each member extending axially in opposite directions with respect to said rm V 1% testimony whereofI afiix my signature, in the presence of two witnesses.

EARLE R. KNIGHT.

Witnesses THOMPSON, J osnrn F. WEBER.

by addressing the Commissioner of Yatents,

Washington, D. G.

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